Broadly speaking, my research interests involve software systems and networking. In particular, I'm interested in distributed systems which can introspect the behavior of their constituent hosts and adapt the distributed protocol to improve performance, security, or manageability. In this vein, I've studied how to characterize and predict host availability in distributed systems, and how to make overlay routing robust to malicious forwarding peers. I've applied machine learning techniques to diagnose faults in complex Windows applications. I've also dabbled in creating analytic models for the spread of computer viruses.